kv: address comments
kv: address comments

simon-xia/tidb,kyle-wang/tidb,spongedu/tidb,ngaut/tidb,pingcap/tidb,zs634134578/tidb,myrice/tidb,louishust/tidb,pingcap/tidb,qiuyesuifeng/tidb,kyle-wang/tidb,Cofyc/tidb,anywhy/tidb,mccxj/tidb,EvilMcJerkface/tidb,c4pt0r/tidb,kyle-wang/tidb,c4pt0r/tidb,pingcap/tidb,liyu4/tidb,c4pt0r/tidb,ngaut/tidb,cosmtrek/tidb,ngaut/tidb,tiancaiamao/tidb,andelf/tidb,ming-relax/tidb,silentred/tidb,andelf/tidb,astaxie/tidb,ueizhou/tidb,ming-relax/tidb,kyle-wang/tidb,silenceper/tidb,myrice/tidb,yangwenmai/tidb,cosmtrek/tidb,yangwenmai/tidb,JinheLin/tidb,silentred/tidb,ngaut/tidb,ngaut/tidb,c4pt0r/tidb,zs634134578/tidb,ueizhou/tidb,XuHuaiyu/tidb,8cbx/tidb,wusphinx/tidb,pingcap/tidb,Nify/tidb,spongedu/tidb,mccxj/tidb,Cofyc/tidb,kyle-wang/tidb,kyle-wang/tidb,qhsong/tidb,c4pt0r/tidb,coocood/tidb,simon-xia/tidb,XuHuaiyu/tidb,anywhy/tidb,EvilMcJerkface/tidb,silenceper/tidb,JinheLin/tidb,yuanwhy/tidb,zimulala/tidb,qiuyesuifeng/tidb,coocood/tidb,ngaut/tidb,louishust/tidb,wusphinx/tidb,c4pt0r/tidb,CodeRushing/tidb,yuanwhy/tidb,gaocegege/tidb,8cbx/tidb,tiancaiamao/tidb,Nify/tidb,CodeRushing/tidb,zimulala/tidb,pingcap/tidb,liyu4/tidb,astaxie/tidb,qhsong/tidb,gaocegege/tidb,pingcap/tidb